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Cooling lubricants for screw taps: types & use
In every manual for thread cutting, there is always a strong recommendation to use cooling lubricants for screw taps. This advice should never be overlooked! The process of cutting threads generates friction, which leads to increased heat, tool wear, and poor surface finishes on the threads. Without proper cooling lubrication, both the tap and the workpiece can suffer damage.
When it comes to tap lubrication, there are numerous products available, each with unique features tailored for different applications. These range from varying consistencies to specialized additives that offer benefits such as **corrosion protection** or **enhanced lubrication performance**. With so many options, choosing the right one can feel overwhelming. In this article, we'll break down the key factors to consider when selecting a cooling lubricant for screw taps.
The primary role of cooling lubricants for screw taps and dies is clear: they are designed to cool and lubricate. However, these functions are not always equally important. Depending on the machining process, one function may take precedence over the other. For instance, while cooling is crucial at high cutting speeds, lubrication becomes more vital in maintaining tool life and ensuring smooth operation. Therefore, the emphasis is often placed on the **lubricating effect** in cooling lubricants for screw taps.
In addition to cooling and lubricating, these fluids also help with **chip removal**, ensuring that the material being cut is efficiently carried away. In industrial settings, where large volumes of coolant are continuously supplied, this function is especially effective.
To summarize, the main roles of cooling lubricants for screw taps are:
- Cooling effect
- Lubricating effect
- Chip removal
Cooling lubricants are standardized according to **DIN 51385**, which categorizes them into **water-miscible** and **non-water-miscible** types. Each has its own advantages and applications. Non-water-miscible coolants, typically based on mineral oils, provide excellent lubrication and are ideal for heavy-duty operations. Water-miscible coolants, on the other hand, are mixed with water and excel at heat dissipation, making them suitable for a wide range of materials.
The choice of coolant largely depends on the material being worked on. For example, steel is often machined using water-based coolants, while harder alloys like INCONEL may require non-water-miscible options. Special care must also be taken when working with magnesium, as certain coolants can lead to dangerous reactions. Similarly, titanium requires coolants free from chlorine to prevent stress-corrosion cracking.
In industrial environments, the supply of cooling lubricants must be consistent and evenly distributed. Coolants can be delivered internally through the tool or externally via nozzles. For home or hobby use, manually applying the lubricant is sufficient, but it should still be done regularly to ensure optimal performance.
Choosing the right cooling lubricant is a critical decision that depends on several factors, including the type of tap, the material, and the cutting conditions. While universal products are often suitable for occasional use, it's important to select a reliable brand that meets specific requirements.
If you're looking for a high-quality cooling lubricant for screw taps, consider checking out the cutting paste offered by BAER, a trusted manufacturer. It’s versatile, easy to use, and free from harmful substances like petroleum, chlorine, and sulfur. For more information or assistance, their customer service team is always ready to help.